/*
 * Copyright (C) 2015, United States Government, as represented by the 
 * Administrator of the National Aeronautics and Space Administration.
 * All rights reserved.
 * 
 * The PSYCO: A Predicate-based Symbolic Compositional Reasoning environment 
 * platform is licensed under the Apache License, Version 2.0 (the "License"); you 
 * may not use this file except in compliance with the License. You may obtain a 
 * copy of the License at http://www.apache.org/licenses/LICENSE-2.0. 
 * 
 * Unless required by applicable law or agreed to in writing, software distributed 
 * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
 * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
 * specific language governing permissions and limitations under the License.
 */
package gov.nasa.jpf.jdart;


/**
 * Attribute that is used to mark the root frame for
 * the concolic analysis. This is used to recognize
 * when the concolic execution of the method to be analyzed
 * is finished.
 *  
 *
 */
final class RootFrame {
  
  private static final RootFrame INSTANCE = new RootFrame();
  
  public static RootFrame getInstance() {
    return INSTANCE;
  }
  
  /*
   * (non-Javadoc)
   * @see java.lang.Object#clone()
   */
  @Override
  public RootFrame clone() {
    return this;
  }

  private RootFrame() {
  }

}
